keyword
MENU ▼
Read by QxMD icon Read
search

Quantitative radiology

keyword
https://www.readbyqxmd.com/read/28516046/image-quality-assessment-of-a-1-5t-dedicated-magnetic-resonance-simulator-for-radiotherapy-with-a-flexible-radio-frequency-coil-setting-using-the-standard-american-college-of-radiology-magnetic-resonance-imaging-phantom-test
#1
Oi Lei Wong, Jing Yuan, Siu Ki Yu, Kin Yin Cheung
BACKGROUND: A flexible RF coil setting has to be used on an MR-simulator (MR-sim) in the head and neck simulation scan for radiotherapy (RT) purpose, while the image quality might be compromised due to the sub-optimized flexible coil compared to the normal diagnostic radiological (DR) head coil. In this study, we assessed the image quality of an MR-sim by conducting the standard American College of Radiology (ACR) MRI phantom test on a 1.5T MR-sim under RT-setting and comparing it to DR-setting...
April 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28515410/differentiating-between-central-nervous-system-lymphoma-and-high-grade-glioma-using-dynamic-susceptibility-contrast-and-dynamic-contrast-enhanced-mr-imaging-with-histogram-analysis
#2
Kazuhiro Murayama, Yuya Nishiyama, Yuichi Hirose, Masato Abe, Shigeharu Ohyu, Ayako Ninomiya, Takashi Fukuba, Kazuhiro Katada, Hiroshi Toyama
PURPOSE: We evaluated the diagnostic performance of histogram analysis of data from a combination of dynamic susceptibility contrast (DSC)-magnetic resonance imaging (MRI) and dynamic contrast-enhanced (DCE)-MRI for quantitative differentiation between central nervous system lymphoma (CNSL) and high-grade glioma (HGG), with the aim of identifying useful perfusion parameters as objective radiological markers for differentiating between them. METHODS: Eight lesions with CNSLs and 15 with HGGs who underwent MRI examination, including DCE and DSC-MRI, were enrolled in our retrospective study...
May 18, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28508007/five-year-outcomes-after-treatment-for-acute-instability-of-the-tibiofibular-syndesmosis-using-a-suture-button-fixation-system
#3
Paul F Förschner, Knut Beitzel, Andreas B Imhoff, Stefan Buchmann, Georg Feuerriegel, Felix Hofmann, Dimitrios C Karampinos, Pia Jungmann, Jonas Pogorzelski
BACKGROUND: Suture-button repair is a widely accepted surgical treatment for acute and isolated ankle syndesmosis injuries. To our knowledge, midterm results have not previously been reported. PURPOSE: To evaluate the clinical, qualitative, and quantitative radiological midterm outcomes of suture-button repair after acute isolated ankle syndesmosis injuries. STUDY DESIGN: Retrospective case series; Level of evidence, 4. METHODS: Clinical outcomes were measured using the Foot and Ankle Disability Index (FADI) and the American Orthopaedic Foot and Ankle Society (AOFAS) score...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28501096/combined-diffusion-weighted-imaging-and-dynamic-contrast-enhanced-mri-for-differentiating-radiologically-indeterminate-malignant-from-benign-orbital-masses
#4
X-Q Xu, W Qian, G Ma, H Hu, G-Y Su, H Liu, H-B Shi, F-Y Wu
AIM: To evaluate the performance of the combination of diffusion-weighted (DW) and dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) for differentiating radiologically indeterminate malignant from benign orbital masses. MATERIALS AND METHODS: Sixty-five patients with orbital masses (36 benign and 29 malignant) underwent DW and DCE MRI examinations for pre-treatment evaluation. The apparent diffusion coefficient (ADC) was derived from DW imaging data using the mono-exponential model...
May 10, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28491496/towards-in-vivo-focal-cortical-dysplasia-phenotyping-using-quantitative-mri
#5
REVIEW
Sophie Adler, Sara Lorio, Thomas S Jacques, Barbora Benova, Roxana Gunny, J Helen Cross, Torsten Baldeweg, David W Carmichael
Focal cortical dysplasias (FCDs) are a range of malformations of cortical development each with specific histopathological features. Conventional radiological assessment of standard structural MRI is useful for the localization of lesions but is unable to accurately predict the histopathological features. Quantitative MRI offers the possibility to probe tissue biophysical properties in vivo and may bridge the gap between radiological assessment and ex-vivo histology. This review will cover histological, genetic and radiological features of FCD following the ILAE classification and will explain how quantitative voxel- and surface-based techniques can characterise these features...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28484918/simplified-readability-metric-drives-improvement-of-radiology-reports-an-experiment-on-ultrasound-reports-at-a-pediatric-hospital
#6
Wei Chen, Claire Durkin, Yungui Huang, Brent Adler, Steve Rust, Simon Lin
Highly complex medical documents, including ultrasound reports, are greatly mismatched with patient literacy levels. While improving radiology reports for readability is a longstanding concern, few articles objectively measure the effectiveness of physician training for readability improvement. We hypothesized that writing styles may be evaluated using an objective two-dimensional measure and writing training could improve the writing styles of radiologists. To test it, a simplified "grade vs. length" readability metric is developed based on results from factor analysis of ten readability metrics applied to more than 500,000 radiology reports...
May 8, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28484293/advantages-of-t2-weighted-three-dimensional-and-t1-weighted-three-dimensional-contrast-medium-enhanced-magnetic-resonance-urography-in-examination-of-the-child-population
#7
Adnan Sehic, Fuad Julardzija, Sandra Vegar-Zubovic, Irmina Sefic-Pasic
AIM: The aim of this study is to prove the advantages of combined use of T2 weighted three dimensional (T2 W 3D) and T1 weighted three dimensional contrast medium enhanced (T1 W 3D CE) magnetic resonance (MR) urography in displaying urinary tract in child population. MATERIAL AND METHODS: Total of 120 patients were included in the study, 71 (59%) male patients and 49 (41%) female patients. The study was conducted on the Radiology clinic, University of Sarajevo Clinical Center, during the period from February to November 2016...
March 2017: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28479790/value-of-minimum-apparent-diffusion-coefficient-on-magnetic-resonance-imaging-as-a-biomarker-for-predicting-progression-of-disease-following-surgery-and-radiotherapy-in-glial-tumors-from-a-tertiary-care-center-in-northern-india
#8
Pramod Kumar Gupta, Rishi Awasthi, Shalini Singh, Sanjay Behari, K J Maria Das, Rakesh Kumar Gupta, Shaleen Kumar
PURPOSE: Studies have shown that cellularity of glial tumors are inversely correlated to minimum apparent diffusion coefficient (ADC) values derived on diffusion-weighted imaging (DWI). The purpose of this prospective exploratory study was to evaluate whether temporal change in "minimum ADC" values during follow-up predict progressive disease in glial tumors post radiotherapy and surgery. MATERIALS AND METHODS: Adult patients of glial tumors, subjected to surgery followed by Radiotherapy (RT), were included in the study...
April 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28473075/acr-appropriateness-criteria-%C3%A2-osteoporosis%C3%A2-and%C3%A2-bone-mineral-density
#9
Robert J Ward, Catherine C Roberts, Jenny T Bencardino, Erin Arnold, Steven J Baccei, R Carter Cassidy, Eric Y Chang, Michael G Fox, Bennett S Greenspan, Soterios Gyftopoulos, Mary G Hochman, Douglas N Mintz, Joel S Newman, Charles Reitman, Zehava S Rosenberg, Nehal A Shah, Kirstin M Small, Barbara N Weissman
Osteoporosis is a considerable public health risk, with 50% of women and 20% of men >50 years of age experiencing fracture, with mortality rates of 20% within the first year. Dual x-ray absorptiometry (DXA) is the primary diagnostic modality by which to screen women >65 years of age and men >70 years of age for osteoporosis. In postmenopausal women <65 years of age with additional risk factors for fracture, DXA is recommended. Some patients with bone mineral density above the threshold for treatment may qualify for treatment on the basis of vertebral body fractures detected through a vertebral fracture assessment scan, a lateral spine equivalent generated from a commercial DXA machine...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28459943/circulating-tumor-dna-changes-for-early-monitoring-of-anti-pd1-immunotherapy-a-proof-of-concept-study
#10
L Cabel, F Riva, V Servois, A Livartowski, C Daniel, A Rampanou, O Lantz, E Romano, M Milder, B Buecher, S Piperno-Neumann, V Bernard, S Baulande, I Bieche, J Y Pierga, C Proudhon, F C Bidard
BackgroundRecent clinical results support the use of new immune checkpoint blockers (ICB), such as anti-PD-1 (e.g. nivolumab, pembrolizumab) and anti-PD-L1 antibodies. Radiological evaluation of ICB efficacy during therapy is challenging due to tumor immune infiltration. Changes of circulating tumor DNA (ctDNA) levels during therapy could be a promising tool for very accurate monitoring of treatment efficacy, but data are lacking with ICB.Patients and methodsThis prospective pilot study was conducted in patients with non-small cell lung cancer, uveal melanoma or microsatellite-instable colorectal cancer treated by nivolumab or pembrolizumab monotherapy at Institut Curie...
April 29, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28457930/delayed-venous-drainage-in-ruptured-arteriovenous-malformations-based-on-quantitative-color-coded-digital-subtraction-angiography
#11
Jan-Karl Burkhardt, Xiaolin Chen, Ethan A Winkler, Daniel L Cooke, Helen Kim, Michael T Lawton
OBJECTIVE: Clinically applicable hemodynamic risk factors to predict arteriovenous malformation (AVM) rupture are missing in the literature. The aim of this study was to identify hemodynamic parameters in ruptured and unruptured AVMs based on catheter angiography. METHODS: Patients with frontal and temporal AVMs and Siemens syngo iFlow color-coding angiography were included in this study (n=71). Clinical and radiological data (age, gender, Spetzler-Martin (SM) and supplemented SM grade, and rupture status), and hemodynamic features (contrast mean transit time (MTT) of feeding arteries, draining veins, AVM nidus, and the cerebral circulation time (CCT)) were analyzed...
April 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28448824/a-new-quantitative-method-to-assess-disproportionately-enlarged-subarachnoid-space-desh-in-patients-with-possible-idiopathic-normal-pressure-hydrocephalus-the-silver-index
#12
Nicola Benedetto, Carlo Gambacciani, Filippo Aquila, Davide Tiziano Di Carlo, Riccardo Morganti, Paolo Perrini
OBJECTIVES: Preoperative diagnosis of idiopathic normal-pressure hydrocephalus (iNPH) remains challenging. Recently, the presence of disproportionally enlarged subarachnoid spaces and hydrocephalus (DESH) on diagnostic images has been linked to clinical improvement after ventriculoperitoneal (VP) shunt placement. In this study we describe a new quantitative method to assess DESH on CT scans and to evaluate its prognostic value. PATIENTS AND METHODS: A multiplanar reconstruction software was used to retrospectively evaluate prospectively collected radiological data (CT scans) of 26 controls and 29 consecutive patients that underwent VP shunt placement for possible iNPH...
April 19, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28443205/a-pilot-study-of-radiologic-measures-of-abdominal-adiposity-weighty-contributors-to-early-pancreatic-carcinogenesis-worth-evaluating
#13
Jennifer B Permuth, Jung W Choi, Dung-Tsa Chen, Kun Jiang, Gina DeNicola, Jian-Nong Li, Domenico Coppola, Barbara A Centeno, Anthony Magliocco, Yoganand Balagurunathan, Nipun Merchant, Jose G Trevino, Daniel Jeong
OBJECTIVE: Intra-abdominal fat is a risk factor for pancreatic cancer (PC), but little is known about its contribution to PC precursors known as intraductal papillary mucinous neoplasms (IPMNs). Our goal was to evaluate quantitative radiologic measures of abdominal/visceral obesity as possible diagnostic markers of IPMN severity/pathology. METHODS: In a cohort of 34 surgically-resected, pathologically-confirmed IPMNs (17 benign; 17 malignant) with preoperative abdominal computed tomography (CT) images, we calculated body mass index (BMI) and four radiologic measures of obesity: total abdominal fat (TAF) area, visceral fat area (VFA), subcutaneous fat area (SFA), and visceral to subcutaneous fat ratio (V/S)...
February 2017: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/28443166/correlation-between-topographic-parameters-obtained-by-back-surface-topography-based-on-structured-light-and-radiographic-variables-in-the-assessment-of-back-morphology-in-young-patients-with-idiopathic-scoliosis
#14
Laura Pino-Almero, María Fe Mínguez-Rey, Rosa María Cibrián-Ortiz de Anda, María Rosario Salvador-Palmer, Salvador Sentamans-Segarra
STUDY DESIGN: Optical cross-sectional study. PURPOSE: To study the correlation between asymmetry of the back (measured by means of surface topography) and deformity of the spine (quantified by the Cobb angle). OVERVIEW OF LITERATURE: The Cobb angle is considered the gold standard in diagnosis and follow-up of scoliosis but does not correctly characterize the three-dimensional deformity of scoliosis. Furthermore, the exposure to ionizing radiation may cause harmful effects particularly during the growth stage, including breast cancer and other tumors...
April 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28442757/comparison-of-circulating-tumour-cells-and-circulating-cell-free-epstein-barr-virus-dna-in-patients-with-nasopharyngeal-carcinoma-undergoing-radiotherapy
#15
Jess Honganh Vo, Wen Long Nei, Min Hu, Wai Min Phyo, Fuqiang Wang, Kam Weng Fong, Terence Tan, Yoke Lim Soong, Shie Lee Cheah, Kiattisa Sommat, Huiyu Low, Belinda Ling, Johnson Ng, Wan Loo Tan, Kian Sing Chan, Lynette Oon, Jackie Y Ying, Min-Han Tan
Quantification of Epstein-Barr virus (EBV) cell-free DNA (cfDNA) is commonly used in clinical settings as a circulating biomarker in nasopharyngeal carcinoma (NPC), but there has been no comparison with circulating tumour cells (CTCs). Our study aims to compare the performance of CTC enumeration against EBV cfDNA quantitation through digital PCR (dPCR) and quantitative PCR. 74 plasma samples from 46 NPC patients at baseline and one month after radiotherapy with or without concurrent chemotherapy were analysed...
December 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28441437/quantitative-modeling-of-responses-to-chronic-ionizing-radiation-exposure-using-targeted-and-non-targeted-effects
#16
Igor Shuryak
The biological effects of chronic ionizing radiation exposure can be difficult to study, but important to understand in order to protect the health of occupationally-exposed persons and victims of radiological accidents or malicious events. They include targeted effects (TE) caused by ionizations within/close to nuclear DNA, and non-targeted effects (NTE) caused by damage to other cell structures and/or activation of stress-signaling pathways in distant cells. Data on radiation damage in animal populations exposed over multiple generations to wide ranges of dose rates after the Chernobyl nuclear-power-plant accident are very useful for enhancing our understanding of these processes...
2017: PloS One
https://www.readbyqxmd.com/read/28441314/radiologic-parameters-can-affect-the-preoperative-decision-making-of-three-column-spinal-osteotomies-in-the-treatment-of-severe-and-stiff-kyhposcoliosis
#17
Hengwei Fan, Xueshi Li, Zifang Huang, Wenyuan Sui, Jingfan Yang, Yaolong Deng, Chongwen Wang, Chuandong Lang, Junlin Yang
STUDY DESIGN: Retrospective analysis. OBJECTIVE: To evaluate radiologic parameters affect spine surgeon's osteotomy choice on patients with severe and stiff thoracic kyphoscoliosis. SUMMARY OF BACKGROUD DATA: Three-column osteotomies were developed to address severe and stiff kyphoscolisis. Current choice on osteotomies based on the morphology of kyphosis, global balance and locations of the main curvature, however, quantitative basis for decision-making is still lacking...
April 24, 2017: Spine
https://www.readbyqxmd.com/read/28429878/a-systematic-review-of-ultrasound-imaging-as-a-tool-for-evaluating-haemophilic-arthropathy-in-children-and-adults
#18
REVIEW
C C Ligocki, A Abadeh, K C Wang, T Adams-Webber, V S Blanchette, A S Doria
The purpose of this study was to semi-quantitatively assess the evidence on the value of ultrasound (US) for assessment of haemophilic arthropathy (HA) in children and adults based on the following questions: (1) Does early diagnosis of pathological findings, using available US techniques, impact the functional status of the joint? (2) Do current available US techniques have the ability to accurately detect pathological changes in target joints in haemophilic patients? (3) Does treatment (prophylaxis) improve US evidence of haemophilic arthropathy in children and adults? (4) Is there any association between various US scoring systems and other clinical/radiological constructs? Of the 6880 citations identified searching databases such as MEDLINE, Embase, CENTRAL and Web of Science, 20 articles investigating either the diagnostic accuracy of US and/or US scanning protocols and scoring systems for assessment of HA met the inclusion criteria for the study...
April 21, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28428472/examination-of-a-method-to-determine-the-reference-region-for-calculating-the-specific-binding-ratio-in-dopamine-transporter-imaging
#19
Ayumi Watanabe, Yusuke Inoue, Yuji Asano, Kei Kikuchi, Hiroki Miyatake, Takanobu Tokushige
The specific binding ratio (SBR) was first reported by Tossici-Bolt et al. for quantitative indicators for dopamine transporter (DAT) imaging. It is defined as the ratio of the specific binding concentration of the striatum to the non-specific binding concentration of the whole brain other than the striatum. The non-specific binding concentration is calculated based on the region of interest (ROI), which is set 20 mm inside the outer contour, defined by a threshold technique. Tossici-Bolt et al. used a 50% threshold, but sometimes we couldn't define the ROI of non-specific binding concentration (reference region) and calculate SBR appropriately with a 50% threshold...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28423406/the-rise-of-radiomics-and-implications-for-oncologic-management
#20
Vivek Verma, Charles B Simone, Sunil Krishnan, Steven H Lin, Jinzhong Yang, Stephen M Hahn
Clinical medicine, particularly oncology, is progressing toward personalized care. Whereas the terms genomics, proteomics, transcriptomics, and metabolomics have dominated personalized medicine for the past couple decades, the concept of radiomics was first described in 2012. This nascent concept has major implications for personalized cancer care and involves extracting hundreds of standardized and quantifiable imaging characteristics from diagnostic computed tomography/magnetic resonance imaging images. The central hypothesis of radiomics is that these libraries of quantitative individual voxel-based variables are more sensitively associated with various clinical endpoints compared with the more qualitative radiologic, histopathologic, and clinical data more commonly utilized today...
July 1, 2017: Journal of the National Cancer Institute
keyword
keyword
14091
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"